Well, folks, it looks like T-Mobile Retail Stores will be offering yet another Buy One Get One Free (BOGO) smartphone promotion.  Beginning March 15 through March 31, all Even More postpaid customers on a 2-year service agreement with a $30 Unlimited Web feature will be offered a smartphone of equal or lesser value for free when they activate a second line of service and $30 Unlimited Web feature.  In addition, the upcoming T-Mobile HTC HD2 is included as an eligible smartphone in the BOGO promotion.  Hit the jump for the full details and a list of eligible smartphones. Sound off in the comments!

Smartphone BOGO Details

• New activations and add-a-line only. 2-year postpaid Even More contract required on both lines.
• FlexPay, Even More Plus, and Upgrade customers are not eligible for this promotion.
• $30 Unlimited Web feature must be added to both lines. Exception: Nokia Nuron unlimited Web requirement is the $10 Phone First Unlimited Web data feature.
• Customers purchasing two phones will qualify for two free devices.
• Customers must activate both lines on the same account
• Smartphones must be purchased and activated as part of one transaction at point of sale.
• Discount will be given at point of sale.
• Customer purchases one eligible smartphone and gets a second eligible smartphone for free. Customers may choose any combination of two eligible smartphones. Customer pays for the higher priced device.
• Higher priced device is determined by NET price to the customer after mail-in rebates if applicable.

Eligible Smartphones:

• Samsung Behold II
• BlackBerry Pearl 8120 (all colors)
• BlackBerry Curve 8520
• BlackBerry Curve 8320 (all colors)
• BlackBerry Curve 8900
• BlackBerry Bold 9700
• BlackBerry Pearl Flip
• T-Mobile G1
• T-Mobile myTouch 3G
• T-Mobile myTouch 3G with 3.5mm jack
• T-Mobile myTouch 3G Fender Limited Edition
• Motorola CLIQ
• Motorola CLIQ XT
• Sidekick LX 2009
• T-Mobile Sidekick (2008)
• HTC Touch Pro II
• HTD HD2
• T-Mobile Dash 3G
• Nokia Nuron

o    The unlimited Web requirement for the Nokia Nuron is the $10 Phone First Unlimited Web data feature.

o    The Nokia Nuron has a $50 mail-in rebate. Customers will pay $49.99 at POS for the second Nuron.